"Saturn is the only planet less dense than water (about 30 percent less). In the unlikely event that a large enough ocean could be found, Saturn would float in it."

0.7 g/cm3

The density of Saturn is lower than any other planet. Different sources have
different values for the density of Saturn. They are 0.75 g/cm3,
0.69 g/cm3, and 0.7 g/cm3. Although these numbers
are different they are all close enough to each other to be able to be the density
of Saturn. The formula for density is mass/volume. The mass of Saturn is approximately
95.1 times that of Earth. The volume is approximately 769 times that of Earth.
When scientists divide Saturn's mass/volume they come up with a number close to
0.70 g/cm3.

So I tired to find the density of Saturn by following the formula (m/V). The
mass of Saturn is 5.68 × 1026 kg. And to find the volume
of Saturn we use the formula (4/3)(3.14)(radius)3. Saturn's radius
is 58.2 × 106 M. So when we plug in the formula volume = (4/3)(3.14)(58.2 × 106 m)3 = 8.23 × 1023 m3.
Then to find the density we divide mass by volume = 5.68 × 1026 kg/8.23 × 1023 m3 = 690 kg/m3 = 0.69 g/cm3.

The density of Saturn is less than that of water, which is 1 g/cm3,
so if Saturn were to be dropped into a bathtub it would float. Because of Saturn's
low density it can be determined that the planet is made up mostly of light gases
like hydrogen and helium.

The structure of Saturn has an atmosphere with a consistency of hydrogen and
helium gas. This layer is 1000 kilometers thick. The next layer is made up
of hydrogen. The first 30,000 kilometers of this layer is made up of hydrogen
gas and the rest is made up of hydrogen in a metallic form. Finally, the next
layer, the core, is made up of water, methane and ammonia.

Besides its low density Saturn has other distinguishing characteristic's. One
characteristic is that a series of concentric rings surround the planet. A second
characteristic is the equatorial diameter of Saturn is 74,500 miles and the
polar diameter of Saturn is 67,000 miles. With these measurements Saturn
is an oblate spheroid.